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TPS40170 搭的DC转DC电路,低温空载输出电压不对

Other Parts Discussed in Thread: TPS40170

我用TPS40170做的25V转5V 3A ,低温-10度后,空载,冷启动,输出电压不对,只有2V多,如果常温时就加着电,等温度下到-40度,输出电压还是正常的,